A Site-Selective Doping Strategy of Carbon Anodes with Remarkable K-Ion Storage Capacity

Wenli Zhang; Zhen Cao; Wenxi Wang; Eman Alhajji; Abdul-Hamid M. Emwas; Pedro M. F. J. Da Costa; Luigi Cavallo; Husam N. Alshareef

doi:10.1002/ange.201913368

A Site-Selective Doping Strategy of Carbon Anodes with Remarkable K-Ion Storage Capacity

Wenli Zhang, Zhen Cao, Wenxi Wang, Eman Alhajji, Abdul-Hamid M. Emwas, Pedro M. F. J. Da Costa, Luigi Cavallo, Husam N. Alshareef

Research output: Contribution to journal › Article › peer-review

Abstract

The limited potassium-ion intercalation capacity of graphite hampers development of potassium-ion batteries (PIB). Edge-nitrogen doping is an effective approach to enhance K-ion storage in carbonaceous materials. One shortcoming is the lack of precise control over producing the edge-nitrogen configuration. Here, a molecular-scale copolymer pyrolysis strategy is used to precisely control edge-nitrogen doping in carbonaceous materials. This process results in defect-rich, edge-nitrogen doped carbons (ENDC) with a high nitrogen-doping level (up to 10.5 at %) and a high edge-nitrogen ratio (87.6 %). The optimized ENDC exhibits a high reversible capacity of 423 mAh g−1, a high initial Coulombic efficiency of 65 %, superior rate capability, and long cycle life (93.8 % retention after three months). This strategy can be extended to design other edge-heteroatom-rich carbons through pyrolysis of copolymers for efficient storage of various mobile ions.

Original language	English (US)
Journal	Angewandte Chemie
DOIs	https://doi.org/10.1002/ange.201913368
State	Published - Jan 13 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): URF/1/2980-01-01
Acknowledgements: The research reported in this publication is supported by KingAbdullah University of Science and Technology (KAUST)(URF/1/2980-01-01). The computational work was performed on KAUST supercomputers. The authors thank the Core Laboratories at KAUST for their excellent support.

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https://repository.kaust.edu.sa/bitstream/10754/661427/1/201913368%20proof%20.pdf

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@article{e74f192cbb814f7299b8ec9e24390a1f,

title = "A Site-Selective Doping Strategy of Carbon Anodes with Remarkable K-Ion Storage Capacity",

abstract = "The limited potassium-ion intercalation capacity of graphite hampers development of potassium-ion batteries (PIB). Edge-nitrogen doping is an effective approach to enhance K-ion storage in carbonaceous materials. One shortcoming is the lack of precise control over producing the edge-nitrogen configuration. Here, a molecular-scale copolymer pyrolysis strategy is used to precisely control edge-nitrogen doping in carbonaceous materials. This process results in defect-rich, edge-nitrogen doped carbons (ENDC) with a high nitrogen-doping level (up to 10.5 at %) and a high edge-nitrogen ratio (87.6 %). The optimized ENDC exhibits a high reversible capacity of 423 mAh g−1, a high initial Coulombic efficiency of 65 %, superior rate capability, and long cycle life (93.8 % retention after three months). This strategy can be extended to design other edge-heteroatom-rich carbons through pyrolysis of copolymers for efficient storage of various mobile ions.",

author = "Wenli Zhang and Zhen Cao and Wenxi Wang and Eman Alhajji and Emwas, {Abdul-Hamid M.} and {Da Costa}, {Pedro M. F. J.} and Luigi Cavallo and Alshareef, {Husam N.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): URF/1/2980-01-01 Acknowledgements: The research reported in this publication is supported by KingAbdullah University of Science and Technology (KAUST)(URF/1/2980-01-01). The computational work was performed on KAUST supercomputers. The authors thank the Core Laboratories at KAUST for their excellent support.",

year = "2020",

month = jan,

day = "13",

doi = "10.1002/ange.201913368",

language = "English (US)",

journal = "Angewandte Chemie",

issn = "0044-8249",

publisher = "John Wiley and Sons Ltd",

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T1 - A Site-Selective Doping Strategy of Carbon Anodes with Remarkable K-Ion Storage Capacity

AU - Zhang, Wenli

AU - Cao, Zhen

AU - Wang, Wenxi

AU - Alhajji, Eman

AU - Emwas, Abdul-Hamid M.

AU - Da Costa, Pedro M. F. J.

AU - Cavallo, Luigi

AU - Alshareef, Husam N.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): URF/1/2980-01-01 Acknowledgements: The research reported in this publication is supported by KingAbdullah University of Science and Technology (KAUST)(URF/1/2980-01-01). The computational work was performed on KAUST supercomputers. The authors thank the Core Laboratories at KAUST for their excellent support.

PY - 2020/1/13

Y1 - 2020/1/13

N2 - The limited potassium-ion intercalation capacity of graphite hampers development of potassium-ion batteries (PIB). Edge-nitrogen doping is an effective approach to enhance K-ion storage in carbonaceous materials. One shortcoming is the lack of precise control over producing the edge-nitrogen configuration. Here, a molecular-scale copolymer pyrolysis strategy is used to precisely control edge-nitrogen doping in carbonaceous materials. This process results in defect-rich, edge-nitrogen doped carbons (ENDC) with a high nitrogen-doping level (up to 10.5 at %) and a high edge-nitrogen ratio (87.6 %). The optimized ENDC exhibits a high reversible capacity of 423 mAh g−1, a high initial Coulombic efficiency of 65 %, superior rate capability, and long cycle life (93.8 % retention after three months). This strategy can be extended to design other edge-heteroatom-rich carbons through pyrolysis of copolymers for efficient storage of various mobile ions.

AB - The limited potassium-ion intercalation capacity of graphite hampers development of potassium-ion batteries (PIB). Edge-nitrogen doping is an effective approach to enhance K-ion storage in carbonaceous materials. One shortcoming is the lack of precise control over producing the edge-nitrogen configuration. Here, a molecular-scale copolymer pyrolysis strategy is used to precisely control edge-nitrogen doping in carbonaceous materials. This process results in defect-rich, edge-nitrogen doped carbons (ENDC) with a high nitrogen-doping level (up to 10.5 at %) and a high edge-nitrogen ratio (87.6 %). The optimized ENDC exhibits a high reversible capacity of 423 mAh g−1, a high initial Coulombic efficiency of 65 %, superior rate capability, and long cycle life (93.8 % retention after three months). This strategy can be extended to design other edge-heteroatom-rich carbons through pyrolysis of copolymers for efficient storage of various mobile ions.

UR - http://hdl.handle.net/10754/661427

UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/ange.201913368

U2 - 10.1002/ange.201913368

DO - 10.1002/ange.201913368

M3 - Article

SN - 0044-8249

JO - Angewandte Chemie

JF - Angewandte Chemie

ER -

A Site-Selective Doping Strategy of Carbon Anodes with Remarkable K-Ion Storage Capacity

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